California Residency Audit FAQs

A California residency audit is an examination conducted by the California Franchise Tax Board (FTB) to determine whether an individual was a California resident, part-year resident, or nonresident during a particular tax year. Residency audits often involve substantial tax liabilities, particularly for individuals with significant investment income, business interests, or capital gains.

California taxes residents on their worldwide income. Because California has one of the highest individual income tax rates in the country, the FTB closely examines taxpayers who claim to have established residency in another state or country.

Generally, California residents are taxed on all income regardless of where it is earned. Nonresidents are generally taxed only on income derived from California sources.
Determining residency is often a complex factual and legal inquiry that considers numerous factors rather than a single bright-line rule.

Domicile generally refers to a person’s permanent home—the place they intend to return whenever absent. Residency is a separate legal concept that focuses on where an individual actually lives and maintains sufficient connections.
A person may remain domiciled in California while claiming to be a nonresident for income tax purposes, depending on the facts.

The FTB evaluates the totality of the circumstances. No single factor determines residency.
The FTB may examine numerous factors, including:
• Where you maintain your principal residence
• Time spent inside and outside California
• Location of your spouse and children
• Business activities
• Ownership and use of real property
• Driver’s license and vehicle registration
• Voter registration
• Banking relationships
• Medical providers
• Social and community ties
• Location of valuable personal property

No.
Unlike some jurisdictions, California does not have a simple rule providing that spending fewer than 183 days in the state automatically makes someone a nonresident.
Although the amount of time spent in California is important, residency determinations depend on all relevant facts and circumstances.

Moving alone does not necessarily terminate California residency.
The FTB evaluates whether you have genuinely established residency elsewhere and whether your California ties have been sufficiently reduced.

Yes.
Owning California real estate does not automatically make someone a California resident.
However, continued ownership and personal use of a California residence may be an important factor considered during a residency audit.

Potentially.
If the FTB concludes that you remained a California resident or never effectively changed your residency, it may continue to tax your worldwide income.

No.
Simply relocating to a state without an income tax does not automatically terminate California residency.
The FTB will examine whether your move was genuine and whether your overall lifestyle and connections demonstrate that you established residency elsewhere.

Many individuals maintain homes in multiple states.
In these situations, residency often depends on where your closest personal, professional, and financial connections exist.

If you are properly classified as a nonresident, many types of investment income generally are not taxable by California.
However, income derived from California sources may remain subject to California taxation.

It can.
Remote work may create complex residency issues depending upon where services are performed, where the employer is located, and the individual’s overall facts and circumstances.

Residency audits are often extensive.
The FTB may request:
• Credit card records
• Bank statements
• Cell phone records
• Travel records
• Flight itineraries
• Utility bills
• Real estate records
• Medical records
• Social media information
• Calendars
• Business records
The purpose is often to reconstruct where you actually lived during the years under examination.

Complex residency audits frequently last many months and sometimes longer than a year, depending on the issues involved and the amount of documentation required.

In certain circumstances, the FTB may seek information from spouses, employers, business associates, or other third parties.

Taxpayers generally have administrative appeal rights and may ultimately challenge adverse determinations through California’s tax dispute procedures.

Residency audits often involve significant amounts of tax because California residents are generally taxed on worldwide income, including investment gains, business income, and other earnings.
For that reason, residency examinations frequently focus on executives, entrepreneurs, investors, and individuals with substantial income.

Possibly.
Whether California may tax gain from the sale of a business depends on numerous legal and factual issues, including residency, sourcing rules, and the nature of the transaction.

Trust taxation involves specialized residency rules that differ from the rules applicable to individuals.
Determining whether California may tax trust income often requires careful analysis of the trust, its fiduciaries, beneficiaries, and sources of income.

Individuals planning to relocate should carefully evaluate how the move may affect their California tax obligations.
Maintaining contemporaneous documentation and understanding how the FTB evaluates residency can help reduce the risk of future disputes.

Driver’s licenses, vehicle registrations, voter registration, and similar items are among the many factors the FTB may consider.
Individuals relocating from California should carefully evaluate these and other connections as part of an overall residency plan.

No.
Changing your mailing address alone is rarely sufficient to establish that California residency has ended.

Residency audits often involve complex legal standards, extensive factual development, and potentially substantial tax liabilities. Experienced legal representation can help protect your rights, develop the factual record, and present your case effectively.

Ben-Cohen Law Firm represents individuals, executives, business owners, investors, and other high-net-worth taxpayers in complex California residency audits and tax controversies.
Residency cases often require far more than counting days spent in California. Successfully defending a residency position typically involves developing a comprehensive factual record, understanding California residency law, and presenting persuasive legal arguments throughout the audit and any subsequent appeal or litigation.
Our firm works closely with clients to analyze their residency status, respond to Franchise Tax Board inquiries, and advocate for favorable resolutions in residency disputes.